<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        * {
            margin: 0;
            padding: 0;
            list-style: none;
            text-align: center;
            width: 500px;
        }

        #ulbox1 {
            height: 600px;
            overflow: auto;
        }

        #ulbox1 li:o #btn {
            width: 100px;
            height: 60px;
            position: fixed;
            top: 40px;
            left: 600px;
        }

        .devsite-section-back-to-top-link {
            cursor: default;
            right: 120px;
            color: #039be5;
            vertical-align: bottom;
            position: fixed;
            background: #039be5;
            border-radius: 50%;
            bottom: 40px;
            box-shadow: 0 0 4px rgba(0, 0, 0, .14), 0 4px 4px rgba(0, 0, 0, .28);
            color: #fff;
            font-size: 36px;
            height: 56px;
            margin-top: 40px;
            opacity: 1;
            padding: 10px;
            position: absolute;
            transition: background .2s, color .2s, opacity .5s;
            width: 56px;
            outline: 0;
            text-decoration: none;
            font-family: 'Material Icons';
            font-weight: normal;
            font-style: normal;
            line-height: 1;
            letter-spacing: normal;
            text-transform: none;
            display: inline-block;
            white-space: nowrap;
            word-wrap: normal;
            direction: ltr;
            -webkit-font-smoothing: antialiased;
        }

        .devsite-section-back-to-top-link::before {
            color: white;
            content: 'arrow_upward';
        }
    </style>
</head>

<body>
    <div>
        <ul id="ulbox1">
            <li>1</li>
            <li>2</li>
            <li>3</li>
            <li>4</li>
            <li>5</li>
            <li>6</li>
            <li>7</li>
            <li>8</li>
            <li>9</li>
            <li>10</li>
            <li>11</li>
            <li>12</li>
            <li>13</li>
            <li>14</li>
            <li>15</li>
            <li>16</li>
            <li>17</li>
            <li>18</li>
            <li>19</li>
            <li>20</li>
        </ul>
    </div>
    <p style="height: 30px;"></p>
    <ul id="ulbox2">
        <li>a1</li>
        <li>a2</li>
        <li>a3</li>
        <li>a4</li>
        <li>a5</li>
        <li>a6</li>
    </ul>
    <a href="#section-index" class="devsite-section-back-to-top-link material-icons devsite-section-back-to-top-pinned" data-tooltip-align="b,c"
        data-tooltip="返回产品索引" aria-label="返回产品索引" data-title="返回产品索引"></a>
    <button id="btn">添加</button>
    <script type="text/javascript" src="./jquery.js"></script>
    <script type="text/javascript">
        $("#btn").on("click", function () {
            //$("#ulbox1").prepend($("#ulbox2").html());
            $("#ulbox1").append($("#ulbox2").html())
        })
    </script>
    <script type="text/javascript" src="检测设备.js"></script>
</body>

</html>